jQuery.fn.pagination = function(maxentries, itemsPerPage, opts, nowPage) {
    if(maxentries <= itemsPerPage) {
        $("div.page").hide();
        return;
    }
    $("div.page").show();
    opts = jQuery.extend({
        items_per_page: itemsPerPage || 10,
        num_display_entries: 10,
        current_page: nowPage || 0,
        num_edge_entries: 0,
        link_to: "javascript:void(0)",
        first_text: "«",
        last_text: "»",
        prev_text: "‹",
        next_text: "›",
        ellipse_text: "...",
        prev_show_always: true,
        next_show_always: true,
        callback: function() {
            return false;
        }
    }, opts || {});

    return this.each(function() {
        /**
         * Calculate the maximum number of pages
         */
        function numPages() {
            return Math.ceil(maxentries / opts.items_per_page);
        }

        /**
         * Calculate start and end point of pagination links depending on
         * current_page and num_display_entries.
         * @return {Array}
         */
        function getInterval() {
            var ne_half = Math.ceil(opts.num_display_entries / 2);
            var np = numPages();
            var upper_limit = np - opts.num_display_entries;
            var start = current_page > ne_half ? Math.max(Math.min(current_page - ne_half, upper_limit), 0) : 0;
            var end = current_page > ne_half ? Math.min(current_page + ne_half, np) : Math.min(opts.num_display_entries, np);
            return [start, end];
        }

        /**
         * This is the event handling function for the pagination links.
         * @param {int} page_id The new page number
         */
        function pageSelected(page_id, evt) {
            current_page = page_id;
            drawLinks();
            var continuePropagation = opts.callback(page_id, panel);
            if (!continuePropagation) {
                if (evt.stopPropagation) {
                    evt.stopPropagation();
                } else {
                    evt.cancelBubble = true;
                }
            }
            return continuePropagation;
        }

        /**
         * This function inserts the pagination links into the container element
         */
        function drawLinks() {
            panel.empty();
            var list = jQuery("<ul class='pagination'></ul>");
            panel.append(list);

            var interval = getInterval();
            var np = numPages();
            // This helper function returns a handler function that calls pageSelected with the right page_id
            var getClickHandler = function(page_id) {
                    return function(evt) {
                        return pageSelected(page_id, evt);
                    }
                }
                // Helper function for generating a single link (or a span tag if it's the current page)
            var appendItem = function(page_id, appendopts) {
                    page_id = page_id < 0 ? 0 : (page_id < np ? page_id : np - 1); // Normalize page id to sane value
                    appendopts = jQuery.extend({
                        text: page_id + 1,
                        classes: ""
                    }, appendopts || {});
                    if (page_id == current_page) {
                        var clazz = appendopts.side ? 'disabled' : 'active';
                        var lstItem = jQuery("<li class='" + clazz + "'><a>" + (appendopts.text) + "</a></li>")
                    } else {
                        var a = jQuery("<a>" + (appendopts.text) + "</a>")
                            .attr('href', opts.link_to.replace(/__id__/, page_id));;
                        var lstItem = jQuery("<li></li>")
                            .bind("click", getClickHandler(page_id));
                        lstItem.append(a);
                    }
                    if (appendopts.classes) {
                        lstItem.addClass(appendopts.classes);
                    }
                    list.append(lstItem);
                }
                // Generate "Previous"-Link
            if (opts.prev_text && (current_page > 0 || opts.prev_show_always)) {
                appendItem(0, {
                    text: opts.first_text,
                    side: true
                });
                appendItem(current_page - 1, {
                    text: opts.prev_text,
                    side: true
                });
            }
            // Generate starting points
            if (interval[0] > 0 && opts.num_edge_entries > 0) {
                var end = Math.min(opts.num_edge_entries, interval[0]);
                for (var i = 0; i < end; i++) {
                    appendItem(i);
                }
                if (opts.num_edge_entries < interval[0] && opts.ellipse_text) {
                    jQuery("<li class='disabled'>" + opts.ellipse_text + "</li>").appendTo(list);
                }
            }
            // Generate interval links
            for (var i = interval[0]; i < interval[1]; i++) {
                appendItem(i);
            }
            // Generate ending points
            if (interval[1] < np && opts.num_edge_entries > 0) {
                if (np - opts.num_edge_entries > interval[1] && opts.ellipse_text) {
                    jQuery("<li class='disabled'>" + opts.ellipse_text + "</li>").appendTo(list);
                }
                var begin = Math.max(np - opts.num_edge_entries, interval[1]);
                for (var i = begin; i < np; i++) {
                    appendItem(i);
                }

            }
            // Generate "Next"-Link
            if (opts.next_text && (current_page < np - 1 || opts.next_show_always)) {
                appendItem(current_page + 1, {
                    text: opts.next_text,
                    side: true
                });
                appendItem(np - 1, {
                    text: opts.last_text,
                    side: true
                });
            }
        }

        // Extract current_page from options
        var current_page = opts.current_page;
        // Create a sane value for maxentries and items_per_page
        maxentries = (!maxentries || maxentries < 0) ? 1 : maxentries;
        opts.items_per_page = (!opts.items_per_page || opts.items_per_page < 0) ? 1 : opts.items_per_page;
        // Store DOM element for easy access from all inner functions
        var panel = jQuery(this);
        // Attach control functions to the DOM element 
        this.selectPage = function(page_id) {
            pageSelected(page_id);
        }
        this.prevPage = function() {
            if (current_page > 0) {
                pageSelected(current_page - 1);
                return true;
            } else {
                return false;
            }
        }
        this.nextPage = function() {
                if (current_page < numPages() - 1) {
                    pageSelected(current_page + 1);
                    return true;
                } else {
                    return false;
                }
            }
            // When all initialisation is done, draw the links
        drawLinks();
        // call callback function
        //opts.callback(current_page, this);
    });
}